Block a sender or an entire domain from sending mail to Qmail server

[Karun]

Block a sender or an entire domain from sending mail to Qmail server

We can block an individual address or entire domain from sending mail to Qmail server by creating the following file:
  /var/qmail/control/badmailfrom
Inside the ” badmailfrom ” file, the syntax might look something like this:

badguy@baddomain.com
@baddomain.com

What do the above lines do?

The entry for “badguy@baddomain.com” would block all mail coming from “badguy@baddomain.com”.
The entry for “@baddomain.com” would block any and all mail coming from the domain “otherdomain.com”.
Now restart the Qmail.

Enjoy……………